Machine for framing timbers.



PATENTED OCT. 29.1907.

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J. PETERS 6 E. H. N. GLARKSON. MACHINE FOR FRAMING TIMBERS. APPLICATIONP ILED JULY 11, 1905. BBNEWBD JULY 17, 1907.

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Y No. 669,646. PATENTBD OCTI 29, 1967.

J. PETERS 6L E. H. N. CLARKSON.

MACHINE FOR FRAMING TIMBERS. APPLICATION FILED JULY 11, 1906'. BENBWBDJULY 1v, 1907.

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UNITED STATES PATENT OFFIOE.

JACOB PETERS AND EDWARD H. N. OLARKSON, OF BALTIMORE, MARYLAND.

MACHINE FOR FRAMING TIMBERS.

Specification of Letters Patent.

Patented Oct. 29, 1907.

Application filed July 11. 1906 Serial No. 325.604. Renewed July 17.1907. -Serial No. 384,274:-

To all whom 'it may concern:

Be it known that we, JACOB Pn'rnas and EDWARD H. N. CLARnsoN, both ofthe city of Baltimore and State of Maryland, have invented certainImprovements in Machines to be Used in the Framing of Timbers, of whichthe following is a specification.

This invention relates to an improved machine for cutting transverselyextendingl rectangular notches in a scantling, whereby the same may beunited to another scantling at an angle therewith, as commonly used inthe construction of the frame-work of buildings.

"he machine also comprises means for boring the scantlings wherenotched, for the holding bolts, and devices-for cutting the scantlingsinto proper and uniform lengths, as will hereinafter fully appear.

ln the further description of the said invention which follows,reference is made to the accompanying drawings forming a part hereof,and in which,-

Figure 1 is an exterior side view of the improved machine, and Fig. 2 aview of Fig. l looking in the direction indicated by the arrow. Fig. 3is a perspective view of a portion of a scantling as it appears aiter itis taken Yfrom the machine.

Referring now to the drawing, 1 is the frame of the machine and 2 thetable supported by the frame 1, upon which the scantlings are worked.

4 is the driving shaft and 5 the driving pulley.

7 is a saw carriage arranged to slide on suitable guides 9, in adirection crosswise of the table 2.

The saw arbor which rotates in a bearing box on the carriagel 7 isdesignated by 10, the circular saw by 12, and the saw pulley by 13.

14 is a counter-shaft which receives its movement from the driving shaft4 by means of the pulleys 15 and 17, and the belt 19; and the saw pulley13 is driven from the counter-shaft by the pulley 20, andthe belt 21which passes under the guiding pulleys 22.

With the arrangement described, the saw carriage may be driven back andforth a limited distance by means of the rod 23 without materiallyaltering the length of the belt 21. 1n Fig. 2 the saw is shown asoccupying its normal or farthest backward position.

24 represents a scantling which is shown in Figs. 1 and 2 as resting onthe table 2, and in the latter figure, as clamped against an abutment 25by means of clamping screw 27. Fig. 3 shows a part of a completedscantling on an enlarged scale and is drawn in perspective.

29 is a cutter-head carriage, adapted to slide in guides 30 forming inpart an elevated portion of the frame l; and the critter head 2S, whichhas awidth of face equal lto the width oi the rectangulainotch to becnt, is fastened te a shait 31 the bearings for which are secured to anarm 32 hinged to the carriage 29, and supported adjustably in height bya link 33 and a screw 34. By means oi the screw 34 the depth of cut ofthe cutters of the head is easily regulated.

The cutter-head carriage is connected by links 35 to a vibratory upright37 the lower end of which has a bearing box 39 which ts loosely on thecounter-shaft 14 and serves as a pivot for the upright.

The upright 37 carries a shaft 40 en which are se cured the pulleys 41and 42, the latter being driven from the counter-shaft 14 by the pulley45 thereon, and the belt 47, and the fermer communicating motion to thecutter-head shaft 31 through the medium of the pulley 49 and the belt50.

lt will be understood that with this construction the cutter headcarriage may be moved forward and backward without changing the lengthof the belts 47 and 50.

The movement of the cutter-head carriage transversely of the machine iseffected by means of a sprocket chain 51 which is extended over sprocketwheels 52 and 53 which have a ixed position, and the sprocket chain isattached to the carriage at some point. The shaft of the sprocket wheelis provided with a hand wheel whereby it is turned to effect thetransverse motion o the carriage just referred to.

54 is a stop-arm against which the scantling is held endwise during eachoperation of the machine. 1t is placed loosely on a threaded bar 55 andbacked by a nut 57 which is set by a wrench so as to retain the stoparmin its proper position with respect to the circular saw and thecutter-head. The stop-arm being loose on the threaded bar, may be easilyraised to admit ot' the scantling being pushed past it in the operationoi the machine hereinafter described.

59 is a boring bit placed in a vertical position in the path of thecutter-head as it is moved crosswise of the machine. The boring bitwhich is suitably guided, is raised and lowered through the medium ofthe hand lover GO.

G2 is the pulley whereby the boring bit is rotated, and to admit of itsgiving a rotary motion to the bit, the bit spindle is provided with afeather which slides with the bit in the pulley.

G3 is the belt whereby the pulley A62 is driven from the pulley 64 onthe counter-shaft 14.

Supposing the various parts of the machine to be constructed and soarranged as to cut rectangular notches of the desired width, depth anddistance apart as described, and the machine to be in operation, andthat a rough end of a scantling has been sawed off by drawing back thecircular saw 12, the scantling is pushed forward until its smooth endcomes in contact with the stop arm 54. The cutter-head 2S is then movedforward which produces a rectangular notch in the upper side of thescantling, and then brought back to its original position.

The boring bit 59 is then raised by means of the hand lever G0 and abolt hole thereby bored through the scantling immediately below thenotch, aiter which the bit is lowered.

The stop-arm 54 is then lited to admit of the scantling passing beneathit, when it is allowed to fall to and rest on the scantling. Thescantling is then again pushed forward until itis stopped bythe stop-armfalling into the notch just made. The notching operation is thenrepeated, and should it be required to provide' the scantling with twonotches only, and the scantling vhas a second time been stopped by thestop-arm as stated, the circular saw is again brought forward and theend of the scantling,- cut off.

We claim as our invention In a machine for cutting rectangular notchesin a scant lingat prescribed distances apart, and one of the notches ata predetermined distance from one end of the scantling, a rotarynotching cutter-head with means to move it transversely of thescantling, a circular saw and appliances independent of those wherebythe notching cutter head is actuated, to move the said saw across thepath of the scantling, combined with a threaded bar placed in a positionparallel with the direction of movement of the scantling, a stop armwhich is loose on the threaded bar so that it may be thrown across oraway from the path of the scantling, and a nut on the threaded barwhereby the position of the stop arm when adjusted with respect to thenotching; cutter head and the saw, is maintained, and a verticalboringbit situated below the table with mechanism whereby the bit may beelevated to bore a hole in the notched portion of the scantling whilethe scantlingis held by the stop, substantially as, and for the purposespecified.

JACOB PETERS. EDWARD H. N. CLARKSON. Witnesses WM. T. HOWARD, Gno. B.Garmin.

